cache.h: move remote/connect API out of it

The definition of "struct ref" in "cache.h", a header file so
central to the system, always confused me.  This structure is not
about the local ref used by sha1-name API to name local objects.

It is what refspecs are expanded into, after finding out what refs
the other side has, to define what refs are updated after object
transfer succeeds to what values.  It belongs to "remote.h" together
with "struct refspec".

While we are at it, also move the types and functions related to the
Git transport connection to a new header file connect.h

Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/remote.h b/remote.h
index cf5672466..a85005980 100644
--- a/remote.h
+++ b/remote.h
@@ -71,6 +71,52 @@ struct refspec {
 
 extern const struct refspec *tag_refspec;
 
+struct ref {
+	struct ref *next;
+	unsigned char old_sha1[20];
+	unsigned char new_sha1[20];
+	char *symref;
+	unsigned int
+		force:1,
+		forced_update:1,
+		deletion:1,
+		matched:1;
+
+	/*
+	 * Order is important here, as we write to FETCH_HEAD
+	 * in numeric order. And the default NOT_FOR_MERGE
+	 * should be 0, so that xcalloc'd structures get it
+	 * by default.
+	 */
+	enum {
+		FETCH_HEAD_MERGE = -1,
+		FETCH_HEAD_NOT_FOR_MERGE = 0,
+		FETCH_HEAD_IGNORE = 1
+	} fetch_head_status;
+
+	enum {
+		REF_STATUS_NONE = 0,
+		REF_STATUS_OK,
+		REF_STATUS_REJECT_NONFASTFORWARD,
+		REF_STATUS_REJECT_ALREADY_EXISTS,
+		REF_STATUS_REJECT_NODELETE,
+		REF_STATUS_REJECT_FETCH_FIRST,
+		REF_STATUS_REJECT_NEEDS_FORCE,
+		REF_STATUS_UPTODATE,
+		REF_STATUS_REMOTE_REJECT,
+		REF_STATUS_EXPECTING_REPORT
+	} status;
+	char *remote_status;
+	struct ref *peer_ref; /* when renaming */
+	char name[FLEX_ARRAY]; /* more */
+};
+
+#define REF_NORMAL	(1u << 0)
+#define REF_HEADS	(1u << 1)
+#define REF_TAGS	(1u << 2)
+
+extern struct ref *find_ref_by_name(const struct ref *list, const char *name);
+
 struct ref *alloc_ref(const char *name);
 struct ref *copy_ref(const struct ref *ref);
 struct ref *copy_ref_list(const struct ref *ref);
@@ -84,6 +130,14 @@ int check_ref_type(const struct ref *ref, int flags);
  */
 void free_refs(struct ref *ref);
 
+struct extra_have_objects {
+	int nr, alloc;
+	unsigned char (*array)[20];
+};
+extern struct ref **get_remote_heads(int in, char *src_buf, size_t src_len,
+				     struct ref **list, unsigned int flags,
+				     struct extra_have_objects *);
+
 int resolve_remote_symref(struct ref *ref, struct ref *list);
 int ref_newer(const unsigned char *new_sha1, const unsigned char *old_sha1);